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Income Taxes (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Abstract] |  |  |
Non-U.S. income included in income (loss) before tax | $ 12,800,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | $ 16,700,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | $ 16,300,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Current [Abstract] |  |  |
Federal | 0 us-gaap_CurrentFederalTaxExpenseBenefit | 0 us-gaap_CurrentFederalTaxExpenseBenefit | 0 us-gaap_CurrentFederalTaxExpenseBenefit
State | 2,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 13,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | (113,000)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign | 213,000 us-gaap_CurrentForeignTaxExpenseBenefit | 175,000 us-gaap_CurrentForeignTaxExpenseBenefit | 966,000 us-gaap_CurrentForeignTaxExpenseBenefit
Total current | 215,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 188,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 853,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred [Abstract] |  |  |
Federal | 0 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 0 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 0 us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total deferred | 0 us-gaap_DeferredIncomeTaxExpenseBenefit | 0 us-gaap_DeferredIncomeTaxExpenseBenefit | 0 us-gaap_DeferredIncomeTaxExpenseBenefit
Total net provision for income taxes | 215,000 us-gaap_IncomeTaxExpenseBenefit | 188,000 us-gaap_IncomeTaxExpenseBenefit | 853,000 us-gaap_IncomeTaxExpenseBenefit
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate [Abstract] |  |  |
Statutory federal income tax rate (in hundredths) | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal tax benefits (in hundredths) | (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Change in valuation allowance (in hundredths) | (695.80%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | (111.80%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 23.30%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Stock compensation (in hundredths) | (26.30%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | (1.40%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 1.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Foreign rate differences (in hundredths) | 758.60%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | 85.30%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | (72.50%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Dividend from PRC investee (in hundredths) | (169.80%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends | (19.60%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends | 30.10%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
Net loss from privately-held PRC investments (in hundredths) | 45.60%us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary | 2.50%us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary | (2.60%)us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary
Other (in hundredths) | 14.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 7.30%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (1.60%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate (in hundredths) | (38.50%)us-gaap_EffectiveIncomeTaxRateContinuingOperations | (2.80%)us-gaap_EffectiveIncomeTaxRateContinuingOperations | 12.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Deferred tax assets [Abstract] |  |  |
Net operating loss | 55,654,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 51,818,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Accruals and reserves not yet deductible | 4,517,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | 4,985,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |
Credits | 1,488,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 1,488,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
Deferred tax assets, gross | 61,659,000 us-gaap_DeferredTaxAssetsGross | 58,291,000 us-gaap_DeferredTaxAssetsGross |
Deferred tax liabilities [Abstract] |  |  |
Valuation of investment portfolio | 0 us-gaap_DeferredTaxLiabilitiesInvestments | (288,000)us-gaap_DeferredTaxLiabilitiesInvestments |
Total deferred tax liabilities | 0 us-gaap_DeferredIncomeTaxLiabilities | (288,000)us-gaap_DeferredIncomeTaxLiabilities |
Net deferred tax assets | 61,659,000 axti_DeferredTaxAssetsAndLiabilitiesNetBeforeValuationAllowance | 58,003,000 axti_DeferredTaxAssetsAndLiabilitiesNetBeforeValuationAllowance |
Valuation allowance | (61,659,000)us-gaap_DeferredTaxAssetsValuationAllowance | (58,003,000)us-gaap_DeferredTaxAssetsValuationAllowance |
Net deferred tax assets | 0 us-gaap_DeferredTaxAssetsLiabilitiesNet | 0 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Operating Loss Carryforwards [Line Items] |  |  |
(Increase) and decrease in valuation allowance | 4,000,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 7,000,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
Change in cumulative ownership percentage (in hundredths) | 50.00%axti_ChangeInCumulativeOwnershipPercentage |  |
Period with in which cumulative ownership change | 3 years |  |
Unrecognized tax benefits interest and penalties | 0 axti_UnrecognizedTaxBenefitIncomeTaxPenaltiesAndInterestExpense |  |
Unrecognized tax benefits accrued interest and penalties | 0 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  |
Unrecognized tax liabilities of undistributed earnings of foreign subsidiaries | 67,600,000 axti_UnrecognizedTaxLiabilitiesUndistributedEarningsForeignSubsidiaries |  |
Restricted cash and investments | 18,300,000 us-gaap_RestrictedCashAndInvestments |  |
Cash and investments not available for use | 13,900,000 axti_CashAndInvestmentsNotAvailableForUse |  |
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward] |  |  |
Gross unrecognized tax benefits balance at December 31, 2013 | 16,403,000 us-gaap_UnrecognizedTaxBenefits |  |
Additions based on tax positions related to the current year | 0 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions |  |
Additions for tax positions of prior years | 0 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions |  |
Gross unrecognized tax benefits balance at December 31, 2014 | 16,403,000 us-gaap_UnrecognizedTaxBenefits | 16,403,000 us-gaap_UnrecognizedTaxBenefits |
Unrecognized tax benefit would favorably impact the effective tax rate in future periods if recognized | 16,400,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  |
Minimum [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards, expiration period | Dec. 31, 2017 |  |
Maximum [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards, expiration period | Dec. 31, 2022 |  |
Federal [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 165,700,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Tax credit carryforwards | 1,500,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Tax credit carryforward, expiration period | Dec. 31, 2019 |  |
State [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | $ 5,600,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |

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